The Core iOS Developer’s Cookbook, Fifth Edition

Spell Checker Protocol

Using UITextChecker, you can add a handy little protocol to NSString for checking the spelling correctness of any string (see Listing 6-1).

Listing 6-1 Spell Checker Protocol

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@implementation NSString (SpellCheck) - (BOOL)isSpelledCorrectly {     UITextChecker *checker = [[UITextChecker alloc] init];     NSRange checkRange = NSMakeRange(0, self.length);     NSString *language = [[NSLocale currentLocale]         objectForKey:NSLocaleLanguageCode];     NSRange range = [checker rangeOfMisspelledWordInString:self         range:checkRange startingAt:0 wrap:NO language:language];     return (range.location == NSNotFound); } @end